Engineering Guides

Practical engineering guides that explain the how and why behind the calculators, charts, and material data on Formula Factory.

📐 Manufacturing 3

Selecting BearingsA bearing supports a rotating shaft while minimizing friction. Selecting one starts with the direction of load it must carry. […]Understanding GD and T SymbolsGD&T (Geometric Dimensioning and Tolerancing) is a symbolic language on drawings that controls a feature’s geometry — not just its […]Understanding Tolerances and FitsWhen two parts mate (like a shaft in a hole), the fit describes how loosely or tightly they go together, […]

📐 Mechanical Engineering 2

How to Calculate StressStress measures how hard the internal material of a part is being pushed or pulled, defined as force divided by […]Understanding Factor of SafetyFactor of safety (FoS) tells you how much stronger a part is than it strictly needs to be for its […]

📐 Materials 2

How to Select MaterialsMaterial selection is always a trade-off — no material wins on every axis, so the goal is the best balance […]Understanding Thermal ExpansionMost materials expand when heated and contract when cooled, because higher temperature makes atoms vibrate more and take up more […]

📐 Structural & Flow 1

Sizing Structural Steel BeamsImportant: structural beam sizing is a safety-critical, code-governed calculation. This guide explains the concepts only. Any load-bearing beam must be […]

📐 Engineering 1

Wire Sizing BasicsWire sizing is about choosing a conductor that carries the current safely without overheating or losing too much voltage. Three […]
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.